[firesteelrain]

More than four would increase cost and wouldn’t necessarily be more accurate. I believe each LED emits Red, Blue or Infrared.

But these Apple Watches are not approved by the FDA as medical devices and are less accurate than a pulse oxomiter. Even FitBit doesn’t try to fool anyone.

So what’s the real market to add in measuring oxygen levels? Wellness? You have to not move to use it and we already know the measurements are not accurate.

Feels like they added it to sell more watches and seems like they really bought the farm this time